Prevalence of work-related stress and musculoskeletal disorders was obtained from the questionnaire.
The method used on data obtained from the questionnaire was descriptive analysis (frequencies and percentages).
A statistical analysis to compare "case" versus "control" farms was performed with the variables obtained from the questionnaire (191 variables) and the serologic test results (20 variables).
On the other hand, very strong linear relations were observed between the nonlinear variates obtained from the questionnaire data and linear ones computed from the voice data.
The primary data of this study are obtained from the questionnaire answered by specialists, engineers and top-level managers who work in a petrochemical plant.
Also, based on the results obtained from the questionnaire, it was concluded that using actives in translation of passives and unaccusatives in translation of unaccusatives was more in concordance with Farsi grammar.
ESM of Appendix D illustrates the adjustment factors, their derivation, and the values obtained from the questionnaire.
Additional information on socio-demographic data and the body weight of the respondents were obtained from the questionnaire.
The average weighted conversion rates from RHD to LHD for all types of vehicles from 2005 to 2009 were obtained from the questionnaire survey and vehicle registration database of Rwanda Revenue Authority [18].
According to results obtained from the questionnaire (Table 3), home confinement of symptomatic students increased from a rate of 10% prior to the implementation of the risk communication program to 60% afterwards (p<0.05).
We hypothesized that tumor grade and stage might be the intermediate factors relating vitamin D to prostate cancer progression; therefore we adjusted first for age at diagnosis, smoking (never vs. ever), BMI (<25, ≥25 and <28, or ≥28 kg/m2), and physical activity (low, moderate, or high) obtained from the questionnaire collected before the blood donation.
